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BROWNING ON DECORATIVE CHROME PARTS

As of the past several months back we have been experiencing a brown film after chroming process on nickel plated parts. Large pieces such as bumpers turn out fine but smaller parts such as moldings, auto and motorcycle parts, nuts and bolts, etc. do not. The film is almost like a paint like looking coating layer. Note: It is not a nickel spot. It's an 1,100 gal. hexavalent chrome tank. Any input would be appreciated we are at our wits end.

Sharri Neel
chrome plating shop - Yuba City, California, USA
2003

"Chromium Plating"
by Weiner & Walmsley

on AbeBooks
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or Amazon
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First of two simultaneous responses --

Check your ratio between hex chrome and sulphate. Remember to subtract fe, cu, and Tri valent chrome.

Chris Snyder
plater - Charlotte, North Carolina
2003

Second of two simultaneous responses --

I think you have a problem of LCD. Check point 1. Rate of chromic acid and sulfuric acid 2. Auxiliary anode

SE DO JANG
- Korea
2003

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